Alternator not charging
#2180900
10/23/16 04:48 PM
10/23/16 04:48 PM
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Joined: Apr 2013
Posts: 51
Jacksonville, AR
dmckeehan
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OP
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Joined: Apr 2013
Posts: 51
Jacksonville, AR
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1984 W150 360. Truck was swapped over to a 93 model Nippendenso style alternator 1 year ago. Truck was charging fine. Feed line from alternator to battery shorted on intake, and melted cable, and shorted battery. Replaced battery, replaced feed cable from alternator to battery and new ground cable from alternator to block. Now it is a no charge situation. New alternator, no help, had it tested, tested good. Changed voltage regulator from running truck, no help. changed plug for voltage regulator, no help. Now for the testing. checked battery post to battery case, no voltage leakage internal in battery. Positive charging stud to positive post is about .21 volts, within the specs. Alternator to negative post, .15 volts, within the specs that I have seen. Voltage regulator to negative post, .10 volts, again, within the specs that i've seen.
Checked battery voltage to voltage regulator, solid battery voltage to voltage regulator. battery voltage on both field wires on alternator with key on.
I'm lost, anything else to check?
1985 Crew Cab W250 4x4 - daily driver, 5.9 magnum, carbed and distributor, A-518 and NP205
2002 3500 extended cab, 4x4, Cummins and 6 speed
1997 Ram 2500 5.9 with 35 Boggers - Mud Racer
1993 Dakota 4x4, Dana 60's front and rear - work in progress
1992 Dakota 2wd short bed, awaiting 440 swap
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Re: Alternator not charging
[Re: dmckeehan]
#2180915
10/23/16 05:14 PM
10/23/16 05:14 PM
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Joined: Sep 2007
Posts: 14,889
up yours
Supercuda
About to go away
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About to go away
Joined: Sep 2007
Posts: 14,889
up yours
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Sounds like the green wire between the alternator field terminal and the VR is open.
They say there are no such thing as a stupid question.
They say there is always the exception that proves the rule.
Don't be the exception.
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Re: Alternator not charging
[Re: dmckeehan]
#2180947
10/23/16 06:33 PM
10/23/16 06:33 PM
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Joined: Apr 2013
Posts: 51
Jacksonville, AR
dmckeehan
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OP
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Joined: Apr 2013
Posts: 51
Jacksonville, AR
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Ok, I'm going to check the green wire, and the connection pack for the field wires. Maybe when it shorted, it caused a short in that connection pack
1985 Crew Cab W250 4x4 - daily driver, 5.9 magnum, carbed and distributor, A-518 and NP205
2002 3500 extended cab, 4x4, Cummins and 6 speed
1997 Ram 2500 5.9 with 35 Boggers - Mud Racer
1993 Dakota 4x4, Dana 60's front and rear - work in progress
1992 Dakota 2wd short bed, awaiting 440 swap
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Re: Alternator not charging
[Re: dmckeehan]
#2180952
10/23/16 06:46 PM
10/23/16 06:46 PM
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Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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What Supercuda said, pull the green wire connector off of its alt male field brass terminal & with some jumpers with alligator clips jump that alt male field terminal (not the wire you pulled off of it) to ground with eng at a fast idle & see if it charges. do this for several seconds only, just long enough to take a reading on the meter & do have all lights/accessories off.
live every 24 hour block of time like it's your last day on earth
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Re: Alternator not charging
[Re: dmckeehan]
#2181407
10/24/16 01:52 PM
10/24/16 01:52 PM
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Joined: Sep 2007
Posts: 14,889
up yours
Supercuda
About to go away
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About to go away
Joined: Sep 2007
Posts: 14,889
up yours
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I have also seen where the triangular plug at the VR is an issue. Sometimes the sockets int he plug open up a bit and make poor, or no, contact with the terminals on the VR itself. A squeeze with needle nose pliers usually fixes that.
They say there are no such thing as a stupid question.
They say there is always the exception that proves the rule.
Don't be the exception.
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Re: Alternator not charging
[Re: Supercuda]
#2181783
10/24/16 10:08 PM
10/24/16 10:08 PM
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Joined: Apr 2013
Posts: 51
Jacksonville, AR
dmckeehan
OP
member
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OP
member
Joined: Apr 2013
Posts: 51
Jacksonville, AR
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I've had the problem with the triangle plug before too, actually bought a new plug, and installed it trying to figure this out. New one fit tight on the connectors.
Got a few other things around the house this week, will get back on this project this weekend. thanks for the help guys!
1985 Crew Cab W250 4x4 - daily driver, 5.9 magnum, carbed and distributor, A-518 and NP205
2002 3500 extended cab, 4x4, Cummins and 6 speed
1997 Ram 2500 5.9 with 35 Boggers - Mud Racer
1993 Dakota 4x4, Dana 60's front and rear - work in progress
1992 Dakota 2wd short bed, awaiting 440 swap
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